Home / 20,242.20-27,916.14-12,689.46

Finding the Fourth Proportional to 20,242.20, 27,916.14 and 12,689.46

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Solution

The fourth proportional to 20,242.20, 27,916.14 and 12,689.46 is: 17,500.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,242.20 : 27,916.14 = 12,689.46 : x
  2. Step 2: Convert to fraction form
    20,242.20/27,916.14 = 12,689.46/x
  3. Step 3: Cross multiply
    20,242.20x = 27,916.14 × 12,689.46
  4. Step 4: Simplify right side
    20,242.20x = 354,240,789.47
  5. Step 5: Solve for x
    x = 354,240,789.47/20,242.20
  6. Step 6: Final answer
    x = 17,500.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.